Im trying to source the SS adjustable pressure relief valves seen on some DIY counterpressure fillers and this model,
http://www.morebeer.com/products/co...3EWvwyEptC1vsu2WGPDzydBkI7xvABJu7NhoCwHbw_wcB
http://www.morebeer.com/products/co...3EWvwyEptC1vsu2WGPDzydBkI7xvABJu7NhoCwHbw_wcB